"What it's style be?" What the heck language is that? Ha ha ha. Kidding.
Anyway, I'd strike a partnership with Marvel and/or DC and create a line called Alter Ego. The line would attempt to be a visual representation of the type of clothes a hero's secret identity would wear. In other words, the Clark Kent line would be all chino's, striped dress shirts and sweater vests. The Hal Jordan line would be a boot cut style jean selection, ringer t-shirts and flight jackets. The Bruce Wayne line would be all upscale slacks, togs and things like that - as well as being the tuxedo line. On the Marvel side, the Peter Parker line would be cardigans, relaxed fit jeans and white sneakers. The Tony Stark line would be the upscale suit division. Etc., etc., etc.